Feature: #108558 - Add original file name to SanitizeFileNameEvent
See forge#108558
Description
The PSR-14 event
\TYPO3\
does now also provide the original file name. Event listeners can use the
original file name to perform custom string replacements (e.g. space to
hyphen instead of underscore) for the sanitized file name.
Impact
It is now possible to retrieve the original file name in the PSR-14 event
\TYPO3\.